Water-gage glasses.



I c. M. MENDENHALL.

WATER GAGE GLASSES. APPLICATION FILED MAR- 3. 19m.

Patented Sept. 5, 1916.

EGG

WATER- GAGE GLASSES.

Specification of Letters Patent.

Patented Sept. 5, 1916.

Application filed March 3, 1910. Serial No. 547,011.

To all whom it may concern:

Be it known that I, CLARENCE M. MENDEN- HALL, a citizen of the United States of 'America, residing in New Rochelle, in the county of \Vestchester, in the State of New York, have invented certain new and useful Improvements in ater-Gage Glasses, of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part thereof. 1

My invention relates to the construction of water gages and has for its object to provide a strong, durable and inexpensive Water gage for boilers and one in which the water line will be strongly marked and visible through a wide arc in front of the glass.

My invention consists in part in a novel form of bulls-eye glass chiefly marked b the formation of the inner face of the bulls eye into a series of parallel prisms and also in the formation of the bulls-eye with a portion adapted to engage with and lock into the portion of the casing in which it is seated so as to prevent rotation of the glass. Further, my invention consists in the features of construction of a gage adapted to be used in connection with bulls-eye glasses which features will be best understood as described in connection with the drawings in which my invention is illustrated and in which- Figure 1 is a front elevation of a water gage adapted for use with a plurality of my improved bnlls-eye sight glasses, one of .the latter being removed from the gage. Fig. 2 a cross-section on the line 22 of Fig. 2. Fig. 3 a longitudinal section on the line 3-3 of Fig. l, but showing the bullseye removed in Fig. 1. Fig. 4 is a front ele vation of an improved and preferred form of gage casing adapted for use with bullseye glasses and having novel features of construction which form a part of my in vcntion. Fig. 5 is a cross-scition on the irregular line 5-5 of Fig. 4, and Fig. (3 a view of the inner face of my improved bulls-eye in its preferred form.

A, Figs. 1 2 and 3 is a water gage casing,

having openings B and B at its ends by which it is connected to the boiler and an internal chamber B and having through the case of the casing a series of apertures C C, ctc., adapted for the reception and securing in place of a series of bulls-eye sight glasses. The apertures are externally of circular outline and are formed first with an internally threaded portion C within which lies the non-threaded cylindrical portion C terminating in an inwardly extending flange C which forms a seat for the bulls-eye glass and through which extends an opening C which, as shown, and as I prefer to construct it, is of non-circular section. D, D, etc, are the bulls-eye sight glasses, the outer portion of which is of cylindrical form, as shown at D, terminating in a convex face, as shown at D. Near the inner face of the bulls-eye an outwardly extending flange D is formed which fits into the cylindrical portion C of the aperture G and rests upon the flange or face The inner face I) of the bulls-eye is formed into a series of parallel prisms and is, as shown, of a form which will project and fit into the inner lock therewith and prevent rotation of the bulls-eye in its Silt, the prisms being formed so that when the glass is in place in the casing and the casing in position for use the prisms will lie verti ally. Each bullseye I) is anchored in place in the assembled gage by a corresponding externally threaded ring 1* screwed into the outer threaded portion of the corresponding socket C. A packing washer E is interposed between each rin-g F and the correspoiuling bulls-eye D.

While I believe the construction shown and described to be the best for the purposes I have in view it is obvious that the interlocking of the bulls-eye glass with its seat in the casing so as to prevent rotation of the glass in the casing can be effected by any intcrengaging or interlocking of the glass with the casing.

A, Figs. 4- and 5, shows an improved and pre ferrcd form of sight glass casing having,

as in the case of the casing A, top and bottom apertures as B and B for connection with the boiler. these apertures connecting the chambers B and B", each of which chambers is formed with a series of sight glass apertures, one series indicated at C, .l, (l'( 'lhese apertures are constructed "a the same way as those already described in connection with the casingAand the two series are forn'ied at an acute angle to each other for the double purpose of bringing both series within the clear view of a per son standing in front of the glass, while, at the same time, greatly increasing the arc of visibility through which either one or the apertures C so as to inter other series can be seen. The apertures of the two series are staggered with respect to each other as shown, and so formed and arranged that the Water level in the internal chambers of the casing will always be visible through one or more of the bulls-eye glasses. The bulls-eye glasses used in the casing A are identical with those used in casing A.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is- 1. A bulls-eye sight glass for a water gage having a substantially circular crosssection and an inner face formed into a series of parallel vertical prisms.

2. A bulls-eye sight glass for a Water gage having a substantially circular cross section with a portion of its configuration departing from circular outline and adapted. to fit and lock with a non-circular segtion of the frame of a gage in which it is to he set, and provided with an inner face formed into a series of parallel vertical prisms.

3. A bulls-eye sight glass for awater gage having a flange D adapted to rest upon the gage casing and an inwardly prolecting face of non-circular outline formed into a series of parallel prisms 4:. A water consisting of a metallic casing adapted to be connected to a boiler at the top and bottom and having two rows of sight holes extending through the casing at an acute angle to each other and so that both sets are visible at the same time from the front of the frame the sight holes of one row being formed in staggered relation to and overlapping those of the other and so disposed in the frame that the water line in the casing is always visible through one or more of the staggered holes, in combination with bulls-eye sight glasses set in said sight holes.

A water gage consisting of a metallic casing adapted to be connected to a boiler at the top and bottom and having two rows of sight holes extending through the casing at an acute angle to each other and so that both are visible at the same time from the front of the frame, the sight holes of one row being formed in staggered relation to and overlapping those of the other and so disposed in the frame that the Water line in the casing is always visible through one or more of the staggered holes in combination with bulls-eye sight glasses set in said sight holes and having their inner faces formed into a series of parallel vertical prisms.

6. A water gage consisting of a, metallic casing adapted to be connected to a boiler at the top and bottom and having two rows of sight holes extending through the casing at an acut angle to each other and so that both sets are visible at the same time in front oi the frame, the sight holes of one row being formed in staggered relation to and ovcrlapping those of the other and so disposed in the frame that the vater line in the casing is always visible through one or more of the staggered holes, said sight holes having an outer substantially circular section with a seat at its bottom and a noncircular opening through said seat, in combination. with bulls-eye sight glasses having substantially circular sections adapted to extend into the circular sections of the sight openings, flanges adapted to rest on the seats and noncircular rearward extensions adapted to cxtend and lit into the noncircular openings through the seats, said noncircular portions having a series of parallel vertical prisms formed on them.

CLARENCE M. MENDENHALL.

Witnesses ARNOLD M12, D. STEWART. 

